Hydraulic impactor

A technology of hydraulic impactor and impact body, which is applied to the driving device for drilling in the borehole, drilling equipment, earthwork drilling and production, etc., which can solve the problems of low reliability and complex overall structure of the hydraulic impactor, and achieve Simple structure and high reliability
CN104343385AActive Publication Date: 2015-02-11CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2015-02-11

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Abstract

The invention discloses a hydraulic impactor. Pressure difference formed between the upper end and the lower end of an impacting body by drilling fluid flowing inside an impactor body achieves guide effects on the impacting body and meanwhile enables the impacting body to move axially and reciprocatingly, and a throttle device and an impact transfer device can transmit impact force generated by the impacting body to a drill bit, so that the impacting body can exert the impact force at a certain frequency onto the drill bit. Compared with an existing hydraulic impactor, the hydraulic impactor omits a reversing unit, a working valve and a driving device, thereby being simple in structure and high in use reliability.
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Description

technical field

[0001] The invention relates to a hammer, in particular to a hydraulic hammer, and belongs to the technical field of petroleum drilling. Background technique

[0002] During the development of oil and gas resources, hard rock formations are often encountered. At this time, the drilling efficiency of the drill bit is low, and the drilling cost is high. In order to effectively improve the drilling efficiency of the drill bit in the harder rock formation, people often install impactors on the drill bit.

[0003] The impactor applies an impact force with a certain frequency to the drill bit on the basis of rotary drilling, so that the drill bit bears periodic impact loads to assist rock breaking and improve rock breaking efficiency. At present, most of the common impactors are hydraulic impactors, which usually use reversing elements, working valves and other components to realize the reversing of the driving device (such as hydraulic device), so as to drive the...

Claims

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